A statistically derived adjustment should still be tested against:
Correct Answer
B) The appraiser's knowledge of how the market behaves
Why this is correct: An appraiser's judgment and market knowledge must be used to test if a statistically derived adjustment is reasonable and reflects actual market behavior. Why the other choices are wrong: The client's expectations should not drive the analysis. The assessed value ratio is not a reliable test. Original construction cost records are not relevant to current market value adjustments. Exam tip: Statistics provide a number; appraisal judgment confirms it makes market sense.
Why This Is the Correct Answer
Statistical output can be significant yet economically implausible, so the appraiser's knowledge of market behaviour is the check on whether the adjustment reflects how buyers actually act.
Why the Other Options Are Wrong
Option A: The client's stated expectations for the final conclusion
Client expectations are the one benchmark that must never be used, since deferring to them compromises independence.
Option C: The property's assessed value ratio
Assessed value ratios reflect assessment practice and cycles rather than market behaviour.
Option D: The original construction cost records
Original construction cost measures historical expenditure rather than current contributory value.
Significant Is Not Sensible
Significant Is Not Sensible. A model can be confident and still be wrong about the market.
How to use: When the coefficient and your market knowledge disagree, investigate the model before choosing between them.
Exam Tip
A wrong-signed coefficient — negative value for a desirable feature — is the classic warning of multicollinearity or omitted variables.
Common Mistakes to Avoid
- -Accepting statistical output without a plausibility check
- -Testing an adjustment against assessment or cost data
- -Adjusting toward a client's stated expectation
Concept Deep Dive
Analysis
A statistically derived adjustment is a model output, and a model is a simplification of a market rather than the market itself. Regression can produce a coefficient that is statistically significant and economically implausible — a negative value for an additional bathroom, or a garage adjustment far outside anything paired sales would support — because of multicollinearity, a small or unrepresentative sample, omitted variables, or extrapolation beyond the data's range. The appraiser's market knowledge is the check on that: it asks whether the number is consistent with how buyers in this market actually behave. Where the two conflict, the resolution is to investigate the model rather than to adopt or discard either automatically. The distractors offer checks that are not checks. The client's expectations are the one benchmark an appraiser must never use, since deferring to them compromises independence. Assessment ratios and original construction cost measure other things entirely and cannot validate a market-derived adjustment.
Background Knowledge
Statistically derived adjustments can be distorted by multicollinearity, small or unrepresentative samples, omitted variables and extrapolation. Appraisal judgment tests whether model output is consistent with observed market behaviour.
Real-World Application
An appraiser obtaining a negative bathroom coefficient investigates, finds it correlated with an omitted age variable, respecifies the model and derives a sensible adjustment.
More Sales Comparison Questions
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Previous Question
Two otherwise identical homes sold three weeks apart: Property X (with a corner lot) sold for $372,000; Property Y (interior lot) sold for $360,000. The appraiser adjusts Property Y upward by $12,000 to reflect the corner lot premium when reconciling to the subject, which also has a corner lot. Which statement best describes the flaw in this reasoning?
Next Question
An appraiser uses paired sales to estimate the adjustment for proximity to a public park. Four valid pairs yield adjustments of +$7,200, +$6,800, +$8,100, and +$7,900. The appraiser calculates the mean ($7,500) and notes the range is $1,300. Before applying the adjustment, the appraiser adjusts the $7,500 downward by 5% to reflect weakening buyer preference observed in the most recent two months of listings. Which USPAP requirement does this downward revision most directly satisfy?